/*
 * Copyright (C) 2007 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import java.util.ListIterator;

import com.google.common.annotations.GwtCompatible;

/**
 * A list iterator which forwards all its method calls to another list iterator.
 * Subclasses should override one or more methods to modify the behavior of the
 * backing iterator as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 * 
 * @see ForwardingObject
 * @author Mike Bostock
 * @since 2010.01.04 <b>stable</b> (imported from Google Collections Library)
 */
@GwtCompatible
public abstract class ForwardingListIterator<E> extends ForwardingIterator<E>
        implements ListIterator<E> {

    @Override
    protected abstract ListIterator<E> delegate();

    public void add(E element) {
        delegate().add(element);
    }

    public boolean hasPrevious() {
        return delegate().hasPrevious();
    }

    public int nextIndex() {
        return delegate().nextIndex();
    }

    public E previous() {
        return delegate().previous();
    }

    public int previousIndex() {
        return delegate().previousIndex();
    }

    public void set(E element) {
        delegate().set(element);
    }
}
